New Zealand Plant Protection 63 (2010): 78-83
Aspects of seed biology of ripgut brome (Bromus diandrus) and soft brome (B. hordeaceus) were studied in relation to land management practices. Among the practices tested, burning stubble had a detrimental effect on seed survival. The majority of seeds close to the soil surface were charred or non-viable following a stubble fire. Overall, higher brome infestation was measured in no-tillage compared to minimum tillage or burning treatments. More than 80% of the seeds of both species emerged in the field within the first couple of months after planting, and full germination was achieved by spring. Seed burial at depths from 1 to 20 cm did not significantly affect germination but seedling establishment and vigour was reduced with seed depth. Implications of these results in management of brome grasses are discussed.
Keywords: burning, cultivation, direct drill, cereals, grass weeds, minimum tillage, no tillage, ploughing, weed management.
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